Finding the Fourth Proportional to 2,485.72, 3,431.28 and 1,541.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.72 : 3,431.28 = 1,541.71 : x
2. Step 2: Convert to fraction form
   2,485.72/3,431.28 = 1,541.71/x
3. Step 3: Cross multiply
   2,485.72x = 3,431.28 × 1,541.71
4. Step 4: Simplify right side
   2,485.72x = 5,290,038.69
5. Step 5: Solve for x
   x = 5,290,038.69/2,485.72
6. Step 6: Final answer
   x = 2,128.17